This really resonated with me, I thought it deserved a thread of it's on for really good advice, which I personally will be taking:
The advice to do the absolute minimum while looking for another job is very good advice. I wish I had been told this 7 months ago.
While my sales were the best in my group through April, I knew my manager wanted me gone (only woman in my group, only one over 40). He put me on a PIP he admitted was unattainable, but I've never been one to give up on anything. I figured it would help if I could bring in some deals I was working and show the incremental new Cloud opportunities I was generating. I worked double time, to the point that I started having chest pains and was unable to sleep more than 2 hours per night due to stress. I was past my breaking point but kept pushing anyways.
It didn't matter much. My manager gave me advanced warning prior to June 1, a few hours before my log-in credentials were cut off. Do you know what I did then? I slept. And slept. And slept. 12 hours a day. I muted my phone as just the sound of a text or call made me jumpy. I would wake up and feel the strangest thing: no stress. Then I'd sleep some more. For 3 weeks I slept, catching up on almost 6 years of sleep deprivation. I was far from depressed; I was able to relax for the first time in years. I guess you could say I was finally taking the vacation time that I had denied myself every year before. But burnout is real and extreme burnout can be deadly.
When I knew my days were numbered, I had a choice; kill myself trying to improve my numbers with the chance that it would make a difference or spend all my time looking for another job and insure my failure in my current job. I chose poorly. The second my manager decided my time was up, my fate was sealed. But the additional stress I put on myself set me back mentally, emotionally and physically.
Get out. Either find a way to be riffed (with severance and rehirability) or find a job somewhere else. If you think your days are numbered, whether correctly or not, take your career into your own hands and make your own destiny. I didn't and I regret it.